Talakaveri is the birthplace of the sacred river Kaveri. Talakaveri is located on the slopes of the Brahmagiri hill near Bhagamandala in Kodagu district. However, there is no permanent visible flow from this place to the main river course except during the rainy season. The river Kavery is one of the seven sacred rivers of the Sapta Sindhus belonging to the Hindu scriptures.
At a height of 1276 m above sea level, it has a small temple as well that is visited often by pilgrims. The temple here has been recently renovated by the state government.
There is a small spring called the tirtha kundike or Brahma kundike. It is believed that the river originates from this spring. This spring apparently flows underground and emerges after a short distance. Near the kundike, there is a shrine. In front of the shrine, a huge tank has been built where pilgrims take bath and offer prayers.
The place has two temples. One temple is dedicated to Lord Shiva and has an ancient Shiva Linga. Another temple is of Lord Ganesha. At this temple, you will find a holy Ashwantha tree. According to legend, Lords-Brahma, Vishnu and Mahesh gave darshan of their holy avatars to sage Agastya.
Many devotees visit the shrine during the month of October on Sankramana day. During this time, it is said that one can see sudden bubbling and frothing of the small well which symbolises the appearance of the Goddess Kavery.
Source:
https://coorgtourism.co.in/talakaveri-temple-waterfalls-coorg
https://en.wikipedia.org/wiki/Talakaveri